Tank for storing aerated liquids under pressure.



No. 697,8l8. Patented Apr. l5, I902.

G. 8. DE LACY. TANK FOR STORING AERATED LIQUIDS UNDER PRESSURE.

(Application filed Oct. 12, 1901.]

(No Model.)

,5 GWtorvie UNTTE rates ATET FFICE.

GEORGE S. DE LACY, OF NEW YORK, N. Y.

TANK FOR STORING AERATED LEQUIDS UNDER PRESSURE.

SPECIFICATION forming part of Letters Patent No. 697,818, dated April 15, 1902.

Application filed October 12, 1901. Serial No. 78,488. (No model.)

To a whom it rim/y concern:

Be it known that I, GEORGE SARGENT DE LACY, a citizen of the United States, and a resident of No. 335 East One Hundred and Eighteenth street, in the city of New York, borough of Manhattamin the county and State of New York, have invented certain new and useful Improvements in Tanks for Storing Aerated Liquids under Pressure, of which the following is a specification.

The subject of my invention is a tank for storing aerated liquids under pressure in which the sections of the outer shell of the tank are held together by rivets which pass from the exterior to the interior of the shell and lock or fasten the adjacent sections together. As it is necessary for the rivetingtool to have access to both ends of the rivet in swaging it, it has hitherto been impossible to rivet all the lap-joints. I accomplish this result by first swaging the rivet in one of the overlapping sections, cutting L-shaped slots in the other section, the slots being cut to correspond with the rivets in such a manner as to form a bayonet-lock between the two sections. The overlapping sections are then soldered together, making an air-tight joint strong enough to withstand without danger the great pressure to which it will be subjected in use.

My invention further relates to the various details of construction hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a vertical view, partly in section, of a tank embodying my invention. Fig. 2 is a horizontal section of the same on the line 3 3.

The shell of the tank here illustrated consists of a cylinder a, a head 5, and a cupshaped bottom 6, provided with the upturned lip 20 and mounted on a base 7. The tank is provided with the usual stop-cock 8 and may have the usual siphon. (Not shown.) To prevent corrosion, the shell is provided with the usual tin lining 9.

It has hitherto been impossible to rivet all the lap-joints of such tanks as have no openings through which the riveting-tool can be introduced into the interior thereof. Heretofore in at least one of the overlapping joints the parts were united together by soldering. As the overlapping sections fit tightly one upon the other, it is not possible to cause the solder to flow over all of the adjacent surfaces of the overlapping sections. As a result certain portions of the overlapping sections were not firmly united together and the connection was weak and likely to give way under the strain of the heavy pressure to which such tanks are subjected in actual use, causing great damage and loss. This danger can be obviated by riveting and then soldering the overlapping sections.

In the interior of the cup-shaped bottom 6 and arranged concentrically with. the upturned edge or lip 20 I introduce a band of metal 16, made with a chisel edge 17 at the point of contact with the bottom 6, to which it is secured by soldering or other means. The upper edge of the band 16 is also formed with a chisel edge 19, so as to make a smooth joint between said band 16 and the body 4. The lip 20 and band 16 are spaced apart sufficiently to form between them a seat for the body 4:, and by the construction of the band and its being soldered to the bottom the seat which receives the body provides a soldertight recess. This and the fact that the band is provided with chiseled edges, which tend to close under internal pressure of the tank, insures a tight joint. A further very important advantage in providing a solder-tight connection between the band and the bottom is that when solder is forced between the body and the surrounding lip in finishing the joint it is prevented from finding its way beneath the lower edge of the band and forming sharp projections, which would puncture the lining of the tank when the latter is placed in use. Through the lip 20 of the bottom 6 and the concentric ring 16 I introduce and fasten securely by swaging rivets 14, preferably at points equidistant from each other and flush with the interior surface of the band 16 at 15, the concentric ring 16 being so arranged as to leave an annular space between such ring and the lip 20 of the bottom 6, which shall be equal to the thickness of the material from which the body of the tank 4 is constructed. In the lower edge 13 of the tank 4 I cut L- shaped slots 10, consisting of the longitudinal branch 11 and the horizontal branch 12, corresponding in number to the rivets 14 and so arranged that when the body A is inserted between the ring 16 and the upturned lip of the bottom 6 that the rivets 14 will register with the slots 10.

By the above-described construction I am thus enabled to provide a bottom with a tight recess to receive the body, with rivets introduced into the walls of the recess, while the inner wall of the recess presents a perfectlysmooth surface to the interior of the tank without forming any shoulder, either in connection with the inserted body or the bottom, which would in time destroy the soft-metal lining under the heavy pressure to which the latter is subjected in use.

As the edge 13 is pressed down the rivets will pass through the branch 11. The parts can then be turned so that the rivets will pass along the branch 12, firmly locking the two sections together, after which the two sections are permanently and tightly joined together by solder.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. In a tank for storing aerated liquids, a joint for sections or parts of said tank, comprising a solder-tight recess formed in one of the parts to be united, the inner wall of which presents a smooth surface and tapered edge, rivets extending through the inner and outer walls of said recess and countersunk in the inner wall, and bayonet-joint slots formed on the other part which receives the rivets, as said part enters the recess and engages with them as the parts are relatively turned; the parts being soldered togetherto prevent turning in a manner to disengage the bayonetjoint. 7

2. In a tank for storing aerated liquids, the combination of a body portion having bayonet-joint slots formed near its annular edge and a bottom formed with a solder-tight re-, cess constructed to receive said body portion, and rivets extending through the walls of said recess, the inner wall presenting a smooth interior face with outwardly-tapered annular edge; the parts being interlocked and soldered to prevent unlocking.

3. In a metal tank, the combination of a body portion havingbayonet-joint slots, abottom having a lipsurrounding the body portion, an inner ring covering the joint between the body portion and bottom, spaced apart from the lip to provide a recess to receive the body portion and rivets secured in the inner ring, and in the lip, and passing through the bayonet-joint slots.

4. In a metal tank, the combination of a body portion having bayonet-joint slots, a bottom having a lip surrounding the body portion, an inner ring covering the joint between the body portion and bottom, forming with said lip a recess to receive said body portion and having chiseled edges to avoid making shoulders with said body portion or the bottom, and rivets having their outer ends secured in the lip, and with their inner ends flush with the inner face of the inner ring and passing through the bayonet-joint slots.

5. A joint for metal tanks, comprising bayonet-joint slots in the body portion, a cap having a lip surrounding the body portion, an

inner ringfor covering the joint between the body portion and cap, fixed within the cap with a space between it and the lip to receive the body portion, and having a solder-tight connection with the cap, and rivets secured in said ring and in the lip and passing through the bayonet joint slots.

6. A joint for metal tanks, comprising the body portion formed with bayonet-joint slots, a cap having a lip surrounding the body portion, a ring for covering the joint between the body portion and cap, fixed within the cap with a space between it and the lip to receive the body portion, and soldered at its lower edge to the cap to form a solder-tight closure at the bottom of said body-receiving space and rivets fixed at their ends in the ring and lip and passing through'the bayonet-joint slots.

Signed at New York, in the county of New York and State of New York, this 11th day of October, A. D. 1901.

GEO. S. DE LACY.

Witnesses:

B. A. ITTNER, CYRUS D. BACKUS. 

